// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
// Copyright (C) 1999-2003 Forgotten
// Copyright (C) 2004 Forgotten and the VBA development team

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or(at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include <stdio.h>
#include <string.h>

#include "Globals.h"

extern int systemVerbose;

#define debuggerWriteHalfWord(addr, value) \
    WRITE16LE((u16 *)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask], (value))

#define debuggerReadHalfWord(addr) \
    READ16LE(((u16 *)&map[(addr)>>24].address[(addr) & map[(addr)>>24].mask]))

static bool agbPrintEnabled = false;
static bool agbPrintProtect = false;

bool agbPrintWrite(u32 address, u16 value)
{
	if (agbPrintEnabled)
	{
		if (address == 0x9fe2ffe) // protect
		{
			agbPrintProtect = (value != 0);
			debuggerWriteHalfWord(address, value);
			return true;
		}
		else
		{
			if (agbPrintProtect &&
			    ((address >= 0x9fe20f8 && address <= 0x9fe20ff) // control structure
			     || (address >= 0x8fd0000 && address <= 0x8fdffff)
			     || (address >= 0x9fd0000 && address <= 0x9fdffff)))
			{
				debuggerWriteHalfWord(address, value);
				return true;
			}
		}
	}
	return false;
}

void agbPrintReset()
{
	agbPrintProtect = false;
}

void agbPrintEnable(bool enable)
{
	agbPrintEnabled = enable;
}

bool agbPrintIsEnabled()
{
	return agbPrintEnabled;
}

extern void (*dbgOutput)(char *, u32);

void agbPrintFlush()
{
	u16 get = debuggerReadHalfWord(0x9fe20fc);
	u16 put = debuggerReadHalfWord(0x9fe20fe);

	u32 address = (debuggerReadHalfWord(0x9fe20fa) << 16);
	if (address != 0xfd0000 && address != 0x1fd0000)
	{
		dbgOutput("Did you forget to call AGBPrintInit?\n", 0);
		// get rid of the text otherwise we will continue to be called
		debuggerWriteHalfWord(0x9fe20fc, put);
		return;
	}

	u8 *data = &rom[address];

	while (get != put)
	{
		char c = data[get++];
		char s[2];
		s[0] = c;
		s[1] = 0;

		if (systemVerbose & VERBOSE_AGBPRINT)
			dbgOutput(s, 0);
		if (c == '\n')
			break;
	}
	debuggerWriteHalfWord(0x9fe20fc, get);
}

